20211212104 has 16 divisors (see below), whose sum is σ = 39118475520. Its totient is φ = 9779618640.

The previous prime is 20211212101. The next prime is 20211212123. The reversal of 20211212104 is 40121211202.

It is a super-2 number, since 2×20211212104² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20211212101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40748164 + ... + 40748659.

It is an arithmetic number, because the mean of its divisors is an integer number (2444904720).

Almost surely, 2^20211212104 is an apocalyptic number.

It is an amenable number.

20211212104 is a deficient number, since it is larger than the sum of its proper divisors (18907263416).

20211212104 is a wasteful number, since it uses less digits than its factorization.

20211212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81496860 (or 81496856 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20211212104 its reverse (40121211202), we get a palindrome (60332423306).

The spelling of 20211212104 in words is "twenty billion, two hundred eleven million, two hundred twelve thousand, one hundred four".